• Course Code:  VA02

  • Term:  Summer 2015

  • Open for Enrollment

  • Self-paced

  • Course Author(s)
    Kunal Ghosh
Vlsi crosstalk

VLSI Academy - Crosstalk

Summer 2015

Computer Science

  • Download
    Kunal Ghosh



VLSI Academy - Crosstalk



In electronics, crosstalk is any phenomenon by which a signal transmitted on one circuit or channel of a transmission system creates an undesired effect in another circuit or channel. Crosstalk is usually caused by undesired capacitive, inductive, or conductive coupling from one circuit, part of a circuit, or channel, to another.


In telecommunication or telephony, crosstalk is often distinguishable as pieces of speech or signaling tones leaking from other people's connections. If the connection is analog, twisted pair cabling can often be used to reduce the effects of crosstalk. Alternatively, the signals can be converted to digital form, which is much less susceptible to crosstalk.


In wireless communication, crosstalk is often denoted co-channel interference, and is related to adjacent-channel interference.


In integrated circuit design, crosstalk normally refers to a signal affecting another nearby signal. Usually the coupling is capacitive, and to the nearest neighbor, but other forms of coupling and effects on signals further away are sometimes important, especially in analog designs. There are a wide variety of possible fixes, with increased spacing, wire re-ordering, and shielding being the most common.


In stereo audio reproduction, crosstalk can refer to signal leaking across from one program channel to another. This is an electrical effect and can be quantified with a crosstalk measurement.


In full-field optical coherence tomography, "crosstalk" refers to the phenomenon that due to highly scattering objects, multiple scattered photons reach the image plane and generate coherent signal after traveling a pathlength that matches that of the sample depth within a coherence length.


Performance, Power and Area are the three main pillars of the Chip Design, Crosstalk can hamper all three.


Lets learn "HOW TO REDUCE CROSSTALK?" and how to achieve an efficient Chip design which gives the best performance, uses optimal power and uses minimal Chip area.



Course Details:


 Reasons for Crosstalk

 Introduction to Noise Margin

 Crosstalk Glitch Example

 Factors Affecting Glitch Height

 AC Noise Margin

 Timing Window Concepts

 Impact of Crosstalk on Setup and Hold Timing

 Techniques to Reduce Crosstalk

 Power Supply Noise



Course Structure:


 Section 1: Introduction

 Section 2: Crosstalk - Why and How Crosstalk Appears On Chip

 Section 3: Glitch Examples And Factors Affecting Glitch Height

 Section 4: Tolerable Glitch Height And Introduction To AC Noise Margin

 Section 5: Timing Windows

 Section 6: Crosstalk Delta Delay Analysis

 Section 7: Noise Protection Technique

 Section 8: Power Supply Noise And Power Mesh Solution

 Section 9: Summary

 Section 10: Quiz And Evaluation



Instructor Biography



Kunal Promode Ghosh, MTech, VLSI And Nano-Technology, IIT Mumbai.


This course is a self initiative by Mr. Ghosh, an IIT Bombay Alumnus. He completed his Master's in VLSI and Nano -Technology from IIT Bombay, India.

He believes teaching is a nobel profession, so to keep the spirit burning, in association with this platform, he helps students understand the concepts of VLSI and Chip Design used in the semiconductor Industry and in the professional world.

He has drilled down the huge concept to simple info-graphics and micro video format, which are very easy to understand.

Hope you enjoy the session and Best of Luck for the future.

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